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20 terms

Holt Modern Biology chapter 2 section 3

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polar molecule
a molecule with a positive and a negatively charged end. water is an example
hydrogen bond
the type of bond that links water molecules together
cohesion
when water molecules attract other water molecules. this property creates surface tension
adhesion
the attractive force between two different substances. this causes a meniscus in a glass graduated cylinder
solution
solvent and solute together make up this substance
solute
the substance dissolved in the solvent
solvent
the substance in which the solute is dissolved
aqueous solution
a solution in which water is the solvent
saturated solution
a solution in which no more solute can be added
hydroxide ion
name this ion OH-
hydrogen ion
name this ion H+
acid
a solution in which the hydrogen ion concentration is greater than the hydroxide ion concentration
base
a solution in which the hydroxide ion concentration is greater than the hydrogen ion concentration
neutral solution
a solution in which the hydrogen and hydroxide ion concentrations are in equal amounts
pH scale
the scale used for measuring acids and bases
buffers
a solution that resists changes in pH when an acid or base is added
concentration
the amount of solute in a fixed amount of solution
acids
hydrochloric, sulfuric and nitric are all examples of strong ______________
alkaline
another word used for base
acid rain
precipitation with a low pH generally less than 5.6